Apparatus or means for automatically stopping gramophones and like machines



J. I. RODWAY.

APPARATUS 0R MEANS FOR AUTOMATICALLY STOPPING GRAMOPHONES AND L IKEMACHINES.

APPLICATION FILED MAR. 18, 1920.

1,399,881; Patented Dec.13,1921.

l NYE N TOR L JOHN I NSHA W RODNEY ms nrroxmy V Joins msrraw RODWAY, oranrroran, ENGLAND,

APPARATUS on EANS ron AUTOMATICALLY STOPPING GRAMOPHONES Ann LIKEMACHINES.

Application filed March 18, 1920. Serial No. 368,910; I

(GRANTED UNDER THE raovrsrous or THE sum or amnes a, 1921,41 srar'r.1a., 1313.

To all whom it may concern:

Be it known that 1, JOHN INsHAw Ron- WAY, a subject of the King of GreatBritain, residing at Lyndhurst, Lime Tree avenue, Retford, Notts,England, have invented a new and useful Apparatus or Means forAutomatically Stopping Gramophones and like Machines, (for which I havefiled an ap plication in England June 10,.191 l, Patent N 0. 14,002),ofwhich the following is a specification.

This invention relates to improved apparatus or means for automaticallystopping gramophones and the like on the completion of a record, of thekind which comprises a brake automatically brought into operation by themovement of the sound arm.

Objects of my invention are simplicity and economy of construction, easyapplication to existing machines, and absence of any appreciableretarding stress on the sound arm due to its action on the brakingmeans.

In some known constructions the motion of the sound arm operates a catchand releases a brake lever or bolt which is spring urged against theperiphery of the turntable or said catch releases a spring urged camsurface which forces abrake stud against said periphery. Inanother'known construc-. I

tion the motion of the sound arm releases a catch which holds out ofaction spring operated toggle levers furnished with a brake pad adaptedto be applied to the periphery of the turntable. It has also beenproposed to cause the motion of the sound arm to move a catch carried bythe turntable into position to engage with a fixed stop on the base orcabinet.

Such constructions are more or less complicated, and some of them tendto exercise a retarding stress on the sound arm which is fatal to theproper rendering of a record; furthermorein most cases re-setting of thedevice is necessary.

According 'to'my' invention, I dispense entirely with all spring brakingaction and my sound arm operated brake device comprises a freely pivotedlever so constructed and arranged that when the brake shoe or pad whichit carries is brought lightly into contact with the periphery of theturntable ports'the record 6.

by the movement of the sound arm the power required for more forcibleapplication of the brake is immediately supplied by the rotatingturntable itself as will hereinafter appear. No appreciable. retardingstress is thus placed on the sound arm when it operates the brake. Myapparatus is also preferably s0 arranged that the brake is automaticallyreleased by the act of returning the sound arm to commence record, anddoes not require. re-setting. e In the annexed drawings, Figure 1 shows1n side elevation so much-of an ordinary gramophone to which myinvention is applled as is necessary for the proper comprehension of thelatter. I

Figs. 2 and 3 are plan views respectively showing the brake in the offand on positlons.

modification.

a indicates the rotating table which sup- 0 is the brake lever or membermounted freely on a vertical pivot d carried by a suitable support efixed to the box of the gramophone. In the tail of this lever'there isformed the slot which is engaged by the screw pin or engaging member 9extending downwardly from the arm 72, fixed to the vertical portion ofthe sound arm 11 by the clip member is. Z is a pad or shoe of'felt,leather, rubber or the like carried by the brake lever and adapted tocon-' tact with the periphery of the rotating table a when the lever 0is moved in one direction.

The brake-lever 0 is so constructed and arranged that radial lines drawnrespectively. from the axis of the turntable a and the lever pivot cl tothe point of contact between the brake pad Z and the periphery of theturntable will make an obtuse angle. Directly light contact is made, theturntable rotating'clockwise tends to carry around with it the brakepad, which may be considered to act like a' frictional cog, therebyincreas- Specification of Letters Patent. Patented DQC'. 13, 1921- yFig. 4: is a side elevation showing a slight ing this angle and settingup a toggle action which augments the brake pressure quite of the actionof the sound on the completion of the record the engaging member 9carried by the sound arm having now reached the end of the lever armslot after traveling along the right hand side thereof. In Fi 2 th brakeis shown released by the return movement of the sound arm tne engagingmember 9 having now traveled outwardly of the slot 7 along the oppositeor left hand side thereof. The movement of the brake lever 0 is hereshown as limited by the pin m extending upward from said lever andadapted to contact with stops provided by the walls at the ends of theperipheral recess formed in the washer n fixed on the lever pivot (Z.

r In the modified arrangement, Fig. 4:, the engaging member 9 extendsfrom a clip lc secured to the horizontal in lieu of to the verticalportion of the sound arm In the arrangements shown in the drawings it isassumed that the record terminates near the center of the disk. In thecase of records which commence near the center and terminate at or nearthe periphery it is obvious that the apparatus may easily be arranged,as by a simple inversion. of the brake lever, so that the brake will beapplied by the outward in lieu of by the inward movement of the soundarm.

It is to be understood that I do not. confine or limit myself to theprecise constructions shown whichmay obviously be varied veryconsiderably without in any way departing from my invention. 7

tact with the periphery of the turntable by the movement of the saidarm, the arrangement being such that directly the said pad or shoecontacts with the turntable a toggle action is setup by the rotation ofthe latter, whereby the rotation of said turntable augments the brakepressure independently of the motion of the sound arm.

2. In a gramophone according to claim 1, an engaging memberconsisting'of a pin or stud carried by the sound arm, and a slot in thebrake lever engaged thereby, the arrangement being such that when thesound arm is moved in one direction the engaging member acts upon oneside of this slot and applies the brake while when the sound arm ismoved in the reverse direction said member acts upon the opposite sideor the slot and releases the brake.

In testimony whereof I have signed my name in the presenceof twosubscribing witnesses.

JOHN INSHAW Rom var.

